Reversible sample-separating sieve.



C. Rl ANDERSON. REVERSIBLE SAMPLE SEPARATING SIEVE. APPLICATION FILED APR. 5, 1913.

1,083,423, Patented Jan.6,1914.

wmcooeo COLUMBIA PLANOGRAPH co., WASHINGTON. D. C.

CHARLES ROBERT ANDERSON, 0F FERGUS FALLS, MINNESOTA.

. REVERSIBLE SAMPLE-SEPARATING SIEVE.

Specification of Letters Patent.

Patented Jan. 6, 1914.

Application sied Aprii 5, 1913. seriai No. 759,097.

T 0 all whom it may concern.'

Be it known that I, CHARLES ROBERT ANDERSON, a citizen of the United States, residing at Fergus Falls, in the County of Ottertail and State of Minnesota, have invented a new and useful Reversible Sample- Separating Sieve, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

The object of my invention is to provide a reversible sieve for separating grains, and particularly for separating wild or tame oats and foreign seeds from samples of wheat and to provide a convenient, practical and effective construction and arrangement of screens and sieve members for this purpose.

Figure 1 is a perspective view of my sieve in position to be lled; Fig. 2 is a central longitudinal section of the sieve showing the arrangement of the sieve members and discharge passages.

The framework of my invention consistsy of a body A having an end 1, sides 2 and end piece 3, provided with a door 4 secured to end piece 3, preferably b-y spring hinges, and opening inwardly. A top screen 6 and a bottom screen 5, of fine mesh, are stretched across the framework to form opposite sides. Within the body A and extending parallel with the screens, I provide a sieve member 8, preferably of zinc, and having perforations of such size as to allow wheat to be sifted through but to prevent a large portion of the oats from falling through the perforations. Sieve member 3 extends from end piece 3 to partit-ion 9, as illust-rated in Fig. 2, to provide a receiving chamber, or grain pocket B, into which the door opens. Between door 4 and end piece 3 an opening 11 is provided for the escape of the larger size grain. In the case of wheat and oats, the cats that remain in grain pocket B are dumped out through the slot or opening 11 in door 4, above sieve member 8, when that end is turned downward in turning the sieve over to reverse the position of the grain pockets. Disposed parallel with sieve member 8 I provide a similar sieve 7 extending from partition 10 nearly but not quite to end 1, as illustrated in Fig. 2, to form a chamber or grain pocket C which is separated from the grain pocket B by discharge passage D. Opening out from discharge passage D I provide discharge passage 12, extending between partition 10 and end 3,

through which oats caught on sieve member 1 are dumped or escape in similar manp ner to the discharge of oats from grain pocket B through opening 11. At the reverse end of the sieve I provide a similar discharge passage 13, extending between end 1 and partition 9, for the discharge of the larger grain from grain pocket C and discharge passage D during and following the completion of the second sifting operation, with the sieve in reverse position to that shown in Fig. 2, with grain pocket C uppermost.

In operation, the sieve is stood up on end 1 and the wheat sample is poured into grain pocket B', through door 4. Then the sieve is placed in a suitable inclined or practically horizontal position and by means of a shaking motion and gravity the wheat is sifted through sieve members 7 and 8, into pocket C, where fine seed escapes through screen 5. The oat kernels being longer than the wheat kernels, a large portion of them are discharged through opening 11 and discharge passage 12. The sieve is then revolved (the end having door 4 and opening 11 being turned downward) to a reverse position, with pocket C uppermost, and the sifting operation repeated, remaining oats being discharged through discharge passage 13 and tine seed falling through screen 6. The sample of wheat having thus been cleaned, may be removed from grain pocket B, by turning the sieve on end, with end 1 uppermost. By simply reversing the sieve the sifting operation may be repeated as many times as desirable, until the sample grain is thoroughly cleaned, when it may be removed from grain pocket B by pushing in door 4.

It will be understood that it is within t-he contemplation of my invention to make such changes as may be necessary to adapt this sieve for use withl various grains, etc.

What I claim is:

1. A reversible sieve comprising a body having a plurality of grain pockets, screen members forming the outer sides of said pockets and sieve members forming the inner sides of said pockets, and having an intermediate chamber formed by the sieve members and discharge-passage conduits positioned at reverse ends of the sieve body and opening in reverse directions out of the aforesaid intermediate discharge chamber', and also having discharge-passage conduits at opposite ends of the sieve, one opening I sitioned at opposite ends of tile sieve body',

out of each grain pocket, substantially as set forth.

2. The combination in a reversible sieve of a body provided with opposite grain pockets, of ne-meshed outer screens, a plurality of relatively coarser inner sieve members, and having an intermediate dischargepassage chamber formed by the inner sieve members and discharge-passage conduits po and a slotted door for the admission of grain to one or' the grain pockets and for the discharge of the coarser grain after the sifting operation, substantially as and for the pun poses specified.

CHARLES ROBERT ANDERSON. Witnesses z FRED' LEFFLER,

C. B. KiDDER.

Copiez; of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.. 

